Improvement in flour-bolts



nav-1D T. eHQAT, oF' eEDAR FALL-s, IOWA.

IMPRVEMENT In FLouR-BoLTs.

Speeiliezttiou forming part'of Letters Patent No. 158,626, dated January12, 1875; application led December 10, 1874.

To all whom yt may concern:

Be it known that I, DAVID T. CHOAT, of Cedar Falls, county of Black Hawkand State ot' Iowa, have invented certain new and useful improvementsin. Flour-Bolts, of which the following is Va specification: Y

lhe nature of myinvention consists iu an air tube or trunk placedlongitudinally beneath a revolving boltingreel upon slotted curvedgirders, and having Ya slot along its upper side, and connected at oneend to the mouth otl a blast-fan, as will be hereinafter more fully setforth.

In order to enable. others skilled in theAart to which my inventionappertains to make and use the same, l will now proceed to describe itsconstruction and operation, referring to the annexed drawing, whichforms a part ot' this specification, and in which- Figure l isV a sideelevation ot' a llour-bolt embodying my invention. Fig. 2 is alongitudinal vertical section oi' the same, and .hig. is a crosssectionot' the air-tube. Fig. l is an end View, showing the curved girders (l.

A represents a flour-bolt, constructed in anyr ot the known and usualways, and revolving in a frame, l'l. Underneath the bolt A is placed anair tube or trunk, C, ruiming longitudinally with the bolt, andconnected at one end by a tlcxible pipe, l), with a blast-fan, E.

'lhis l'an may be run by the same power that revolves the bolt by meansot' suitable belt and pulleys.

0n the upper side ot' the tube or trunk C is a longitudinal slot, a, andacross said slot,

through the sides of the tube, are passed 'screws b b at suitableintervals, for the pur- :pose of' contracting and enlarging` the slot atwill, to cont act or enlarge the current ot' air, as may seem desirable.lhe tube C is at each end supported upon curved girders G Gr, upon whichthe air-tube is adjustable, so as to enable the operator to adapt ittothe varying circumstances many mills -arefsubieet to namely, a fasteror slower motion ot' the bolts.

By this device a current et' air is directed against the under sideotthe cloth of the ilourholt, whereby a twofold advantage is gained.l Thefuzz and scuri', being ot' the lightest specilie gravity ot' all thecomponent parts of thel wheat, are raised up oli'the lower insidesurthce ot' the bolt, thus preventing the descending meal fro'ih fallingupon them and tbrcing them through the meshes ot' the cloth, and therebyrellnleringvthe tlour a dark color. ly/briii f j,'iilg a current ot'cold dry air in cont/act with the. new-made ilour, a dryerand/eonsequently stronger article is produced Having thus lullydescribed my invention, what l claim as new, land desire to secure byLetters Patent, is

The combination, with a revolving llourbolt, ol` the air tube or trunkU, having adjustable aperture a, and adjustable upon the gir-ders (i (l,the ilexible pipe ll, and fan ll, all substantially as andi'or thepurposes here in set l'orth.

lu testimony that l. claim the fbregoing as my invention I hereuntoatlix my signature this 24th day ot November, 1874.

DAVID T. CllOAT. \\f'itnesses:

J. J. Tomm'roN, E. 'lowNsnNo

